Refrigerating system



Feb. 7, 1928. 1,658,187

H. w. DYIER REFRIGERATING SYSTEM Filed May 2a. 1.924 2 sheds-:sheetf 1 2g" 4@ 45 4i 4 5 8 i @a 8 O g5 8O 8 Q 8 25 27 O o O @8 58% f 5 O /5 of? O g /7 /4 /g a4 j?, Z/

INVENTOR. f

Feb. 7, 1928. 1,658,187

H. W. DYER REFRIGERATING SYSTEM FiledMay 28. 1924 2 Sheets-Sheet 2 ParentedFeb. 7, 192s.

UNITED' STATES HARRY W. DYER, OF NEW`YORK, N. Y.

REFRIGERATING SYSTEM.

Application led May 28,

This invention relates to refrigerati'ng apparatusand has for an object to provide meanstfor cooling water and the llke from a .stored refrigerant. The invention is shown 5 applied to cooling drinking water .on passenger cars of railway trains for which pur- .pose it is particularly adapted although the details of construction are of general use 1n refrigerators. The objects of the invention l will be more particularly understood from the following specification and the accompanying drawings in which Fig. 1, 1s a sectional elevation ofthe refrigerating device showing the' working features of the. systeml5 and Fig. 2 is a sectional elevation ofa passenger coach withl my invention in place.- This invention comprises a tank which is automatically fed with liquid from a reservoir. A refrigerating coil is placed within this-tank which is fed through a valve controlled by a thermostat with carbonio acid gas from an expansion tank. This expansion tank, in turn, is-fed from a liaslcof liquid carbonio acid through y a reducing valve; the flask, thus ,contains the stored refrigerant which is used as the temperature of the liquid demands'.` The wastegas from the refrigerating coilis Vented to the atmosphere. l

Referring to the drawings, 11 is a Hask of liquid carbonio acid gas of the usual com-Y mercial type, 12 is a connection to the reducing i'alve 13. This valveis ofthe diaphragm type having a diaphragm which controls 35 the piston valve 36 against the pressure in pipe 12. lVhen the pressure in chamber 14a is reduced belowa predetermined value the pressure in pipe12 raises piston valve 36 against the coil spring until the passage 12a is opened permitting the passage of gas from pipe 12- t-o the chamber 14 thereby restoring the incssure in this chamber, which, together with the coil spring restores the piston valve to the position shown closing the passage 12.

This expansion chamber 15 is jacketed as indicated at 16 with av heat resisting material.

From the expansion chamber 15 the refrigerant is fed through pipe 17 to valve 18 operated by the valve stem 19 to control the passage between pipe .17 and pipe 20 which Q leads to the small refrigerating coil 21 and from this coilto the larger coil 22 from which it eventually exhausts through the vent pipe 24. v

1924. Serial No. 716,324.

The tank 23 is filled with water or liquid up to the line a by means hereafter to be described. Invthis liquid the retrigerating coil is immersed and through openings 25 the liquid Hows into the inner tank 26 where it may rise to the level indicated by b compressing thc air in the upper part of this tank. The cooled liquid is drawn 011 through the connection 34 from the inner tank 26.

In the centre of the inner tank the tube 27 Ais placed which is open at the lower cud to receive the thermostat 2 8. The thermostat y.is thus in position to respond to changes of temperature in they liquid in tank 26. Connected with the thermostat is the solenoid' 33 controlled by battery V30 and by wires 29, 31 and 32. Then the temperature rises above a predetermined value the thermostat completes the circuit which nergizes solenoidl 33 thereby raising valve stem 19 and renewing thesupply of refrigerant to coil 21. When the temperature is lowered the thermostat opens the circuit permitting the valve 19 to seat and close the passage between 17 and 20.

`Water is supplied to the tank 23 from the reservoir 48 which may be filled through the opening 49. Pipe 47 connects 48 with the valve 46 which is controlled by the float 41, lever 42 pivoted at 43 and connection 44. The float 41, thus automatically renews the water supply as it is consumed. Pipe 50 vents the chamber 23 to atmosphere;

In operation the liquid carbonio acid gas in flask 11 vaporizesat. about 600 lbs. pressure and through the reducing valve 13 it is expanded into chamber 15 at a pressure ot 100 lbs. or less. The. cold refrigerantk is preserved in this chamber which, it will be noted, is placed in contact with the wall ot the liquid chamber while the outside walls are insulated with a heat resisting covering. The refrigerant in' thus expanding, extracts heat from the liquid'over a large area and produces an initial cooling effect. Further cooling is`under control of the thermostat through` the valve 18 and the refrigerating coils immersed in the liquid. Two coils are shown of dierent sizes to provide for the expansion of the gas as it moves towards the exhaust. Further yexpansion* may be provid- `ed for by the use of a number of coils of different sizes. As carbonio acid gas is heavier than air, air cannot enter the refrigferating coil through the vent pipe. The inner tank 26 from which theliquid 1is drawn i confines the refrigerating coil to the'outer tank and the bot-tom of this coil is placed -above the openings 25 to the inner tank. Should a leakage develop incoils21 or 22,

. the escaping. gas would rise to the surface a and be vented to atmosphere through 50.

Thisiprovides for separating the escapingv gas from the water which -is being used.

The application of this invention toa railway coach is shown in Fig. 2. The flask 11 is placed beneath the floor in a. housing l62 se.

A cured by cleats 63 and accessible for renewal purposes from'the side of the coach. The re# ducing valve and the controlling' valve -are economical and efficient character.'

Having thus described my invention, vI claim:

1. In a refrigerating systemV of the class described, the combination 'of a'chamber to be cooled, a refrigerating coil in said-chamber, an expansion tank surrounding andin v -contact with said chamber, a heat insulating covering for the exposed walls of said expansion tank, a tank with a refrigerant connected with'said 'expansion tank and` means controlled by the temperature of said cooling chamber controlling the passage to said re-ll frigerating coil. 2. In 'a refrigerating system of the class described, the combination ofa chamber to be cooled, a .refrigerating coil in ,said chamber, an annular expansion tank surrounding said chamber, ,a reducing valve, a jtank for storing a: refrigerant, said storage tank connected to said expansion tank through said reducing valve and means controlled by the temperature of said cooling chamber controlling the" passage to said refrigerati'ng coil.

3. In a refrigerating .system of the class described; the combination of an outer andl an inner ,tank with a free passage-therebetween, a'refrigerating 'coil in one of said tanks, a storage tank with a supply of refrigerant and means controlled by 'the temperature of the inner tank for regulating the passage to said refrigerating coil.

4. In ar refrigerating system of the class 4 described, the combination o f an@ outer and',

an inner tank containing a liquid `with a passage connecting said tanks atthe bottom. a refrigerating coil in one ofsaid tanks lo.-

'cated above the connecting` passage,a`stor vage reservoir with' a supply of refrigerant,

means for drawing liquid from the tank not having the refrigerating coil and means controlled by the temperature of said liquid for coirtrolling the passage to said refrigerating co l Signed at New York in the county of New York andState of New York this `8th day of May, A. D. 1924.

' HARRY W. DYER. 

